Hmmm...just to be clear - did you run this against OMPI 1.3.2, or
1.2.8? I see a 1.2.8 in your app name, hence the question.
This option only works with 1.3.2, I'm afraid - it was a new feature.
Ralph
On Jun 23, 2009, at 2:31 PM, Jim Kress ORG wrote:
Ralph,
I did the following:
export OMPI_MCA_mpi_show_mca_params="file,env"
then I checked and found it via the set command as
OMPI_MCA_mpi_show_mca_params=file,env
I then ran my application
./orca hexatriene_TDDFT_get_asa_input_parallel_1.inp >
1.2.8_test_crafted_input_file.out
and got the expected ORCA output in the .out file but nothing at the
command line or in the .out file about mca_params
What did I do wrong?
Jim
On Mon, 2009-06-22 at 19:40 -0600, Ralph Castain wrote:
Sounds very strange, indeed. You might want to check that your app is
actually getting the MCA param that you think it is. Try adding:
-mca mpi_show_mca_params file,env
to your cmd line. This will cause rank=0 to output the MCA params it
thinks were set via the default files and/or environment (including
cmd line).
Ralph
On Jun 22, 2009, at 6:14 PM, Jim Kress ORG wrote:
For the app I am using, ORCA (a Quantum Chemistry program), when it
was
compiled using openMPI 1.2.8 and run under 1.2.8 with the
following in
the openmpi-mca-params.conf file:
btl=self,openib
the app ran fine with no traffic over my Ethernet network and all
traffic over my Infiniband network.
However, now that ORCA has been recompiled with openMPI v1.3.2 and
run
under 1.3.2 (using the same openmpi-mca-params.conf file), the
performance has been reduced by 50% and all the MPI traffic is going
over the Ethernet network.
As a matter of fact, the openMPI v1.3.2 performance now looks
exactly
like the performance I get if I use MPICH 1.2.7.
Anyone have any ideas:
1) How could this have happened?
2) How can I fix it?
a 50% reduction in performance is just not acceptable. Ideas/
suggestions would be appreciated.
Jim
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